Player outraged about defeat (4)
I believe the answer is:
rout
'defeat' is the definition.
(I know that rout is a type of defeat)
'player outraged about' is the wordplay.
'about' indicates a hidden word (the clue goes around or about the answer).
'ROUT' is hidden within 'player outraged'.
(Other definitions for rout that I've seen before include "Overwhelming defeat or disorderly retreat" , "Send fleeing" , "clobber" , "Whitewash" , "Big defeat" .)